The British government has said anyone arriving into the UK from France will now have to self-isolate for two weeks.
It will impact those arriving into Northern Ireland from France.
The new rules - coming into effect from 4am on Saturday morning - also applies to those coming from several other countries, including the Netherlands, Malta and Monaco.
It is due to fears over rising numbers of coronavirus cases, with British officials saying there had been a 66% increase in newly reported cases in France in the past week.
British Transport Secretary Grant Shapps said the new quarantine measure has to be mandatory.
Data shows we need to remove France, the Netherlands, Monaco, Malta, Turks & Caicos & Aruba from our list of #coronavirus Travel Corridors to keep infection rates DOWN. If you arrive in the UK after 0400 Saturday from these destinations, you will need to self-isolate for 14 days.
— Rt Hon Grant Shapps MP (@grantshapps) August 13, 2020
He said: "We've said all the way along that we're going to make the announcement as the data says you should make it.
"We've got to a point with France in particular and these other countries where if we didn't announce it now we would know the infection rate was already too high, and not do anything about it."
France's secretary for European affairs said the British decision was 'regrettable' and that reciprocal measures would soon be announced.
Quarantine list
In May, the UK announced that France and Ireland would be exempt from their quarantine list, but they later backtracked on the exemption for France.
However, it was last month announced that a so-called 'air bridge' would be established between the UK and France - meaning new arrivals into the UK wouldn't have to quarantine.
British authorities have previously removed Spain from the list of 'air bridge' countries, following a rise in coronavirus rates there.
Currently, the Irish Government is continuing to advise against all non-essential travel to the UK, France and Spain.
Anyone arriving from those countries is being asked to restrict their movements for two weeks, although the self-quarantine guidelines do not apply to those travelling into the Republic from Northern Ireland.
